Security News > 2021 > May > JET engine flaws can crash Microsoft's IIS, SQL Server, say Palo Alto researchers

A trio of researchers at Palo Alto Networks has detailed vulnerabilities in the JET database engine, and demonstrated how those flaws can be exploited to ultimately execute malicious code on systems running Microsoft's SQL Server and Internet Information Services web server.

In a talk today at Black Hat Asia titled Give Me a SQL Injection, I Shall PWN IIS and SQL Server, the three explained they found the JET engine - for years an underlying tech for Microsoft Access and other products, and still downloadable today - has many vulnerabilities.

While JET was not designed to do so, the researchers showed that it's possible to designate JET as a "Related provider" to SQL Server.

Tao said access to the databases also requires what he called a "Hidden" method that involved combining SMB and WebDAV. That combo can also be used to create files on IIS and SQL Server hosts.

Once JET and SQL Server are linked, and the SMB/WebDAV connection made, JET users can send queries to SQL Server.

If those queries happen to be SQL injections, they can ultimately crash the SQL Server, or worse.

News URL

https://go.theregister.com/feed/www.theregister.com/2021/05/06/jet_engine_flaws_attack_iis_sql/